WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.Pushing your E9X M3 or 335i on track often leads to rising transmission temperatures that can trigger limp mode or cause long-term damage. The CSF 8042 replaces the factory unit with a dual-pass high-performance core designed to maintain stable operating temperatures during aggressive driving. Lab testing shows this unit is approximately 30% more efficient than the OEM cooler, providing the thermal headroom needed for high-load scenarios.
Key Features
- Dual-pass high-performance core with 11 cooling tubes
- 1-row super-high pressure 22mm wide 11-channel microtube construction
- High-density multi-louvered fin design with 20% more surface area than OEM
- Versatile fitment: Transmission cooler for E9X M3 DCT or Engine Oil cooler for 6MT
- True plug-and-play design with no modifications required
- Accepts all OEM oil-line connections, mounting brackets, and ducting
- Satin aluminum finish
- Replaces OEM part number 17227521376
Specifications
| Core Material | Aluminum |
| Core Row Quantity | 1 |
| Core Width | 22mm |
| Inlet/Outlet Gender | Female |
| Finish | Satin |
| Fitment Type | Specific |
Fits
Fits the BMW E9X M3 (coupe, sedan, and convertible), E9X 335i, and E8X 135i. This unit serves as the transmission oil cooler for DCT-equipped M3 models or as an engine oil cooler for 6-speed manual transmission models.
Installation
This is a drop-in fit application that installs in the OEM location. It requires no modifications and is designed to work with all factory attaching components including oil lines and shrouds. CSF recommends following the manufacturer repair manual for standard installation procedures or utilizing a qualified installation facility.
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